Divide the A4 size sheet of paper into into 3 equal parts along the longest side. The width of each part is 7 cm.

Crease the lines and cut the paper along those lines into 3 equal parts with the help of a ruler.

Divide the length of one of the cut parts in to 20 equal parts by making equally spaced marks.

The dimension of an A4 paper is 29.7cm x 21cm.

Place the remaining two parts of the paper beneath the part that is already marked.

Start cutting all of them along the marked lines.

This will give you 60 paper stips.

Take 2 table spoons of turmeric powder and mix it well in a cup of water.

Dip all your paper strips in turmeric solution.

After the paper strips are soaked well( for 5 minutes) , leave it to dry.

After the yellow litmus papers have dried up you can use a few of them to test for base.

To make litmus paper that tests for acid, take the remaining dry yellow litmus papers and dip them in a basic solution (here Ca(OH)2). The paper turns RED.

Note: The above step confirms the test for base and at the same time these red strips will be used for testing for acid as well.

Now dip those red strips in turmeric solution again.

Soaking the paper strips for too long could damage the paper.

The turmeric solution is not concentrated enough.

The red litmus paper turns white after a while if it's not dipped in turmeric solution after dipping it in base.

What happens when you dip the yellow litmus paper in acid first and base next?

What happens when you dip the red litmus paper in base first and acid next?

What's the difference between a litmus paper and pH paper?

Is there another way to make your own litmus paper?

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